Electric ignition apparatus



F. BILLON.

ELECTRIC IGNITION APPARATUS. APPLICATION FILED JULY 8,1918.

1 ,428, 1 34, Patented Sept. 5, 1922'.

INVENTOR [TB/i100 %MQM ATTY Patented Sept. 5, 1 922.

UNITED STATES PATENT- OFFICE.

FREDERIC BILLON', OF SOLOTHURN, SWITZERLAND.

ELECTRIC IGNITION APPARATUS.

Application filed July 8, 1918. Serial No. 243,893.

To all whom it mwy concern:

7 Be it known that I, Fnnnnmo BILLON, a

citizen of the Swiss Republic, residingat No. 534 St. Niklausstr'asse, in Solothurn, Switzerland, have invented certain new and useful Improvements in Electric Ignition Apparatus, ofwhich the following is a speci fication.

In stationary coil ignition apparatus of the type in which the induction coil is stationary, and the inducing magnet rotates it is usual to'employrotary cam discs and stationary interrupter levers as the mechanism for interrupting the primary circuit. In

such'apparatus, however, wherein itis deinterrupter contacts shall either be made.

flexible, or that rubbing contacts shall be employed for that purpose. Both constructions, however, entail an increase in the primary resistance of the ignition apparatus, which, as is well known, should be kept as low as possible.

The improved apparatus forming the subject-matter of the present invention allows of obviating that drawback. The improved apparatus consists in the feature that an intermediate member is arranged so as to be capable of rocking on its axis in such a manner thatvits displacement takes place along an arc of a-circlefcoiicentric to the said. axis. The result of this is that the limiting surface of the rotating cam strikes the intermediate member always at the same angle and independently of the position of, the said intermediate member, and that the force that effects the raising of the intermediate member remains the same in direction and amount for each variation.-

In theaccompanying diagrammatic drawmgsz- Figure 1 shows an elevation, and

Figure 2 a longitudinal section of a con struction wherein the intermediate member and the interrupter lever are rotated in a plane at right angles to the axis of the ap paratus.

Figures 3 and 4 illustrate a construction wherein the intermediate member and the interrupter levers move in planes at right angles to each other.

The interruption takes place betweenthe two contacts a and b, by the fact that the contact 6 is alternately brought into engagement by the spring 6 against the contact a, which is insulated from the frame and contact '6 by the insulating piece 8 and the make. and break contact is efie'cted by the intermittent action of the bell crank lever d bein secured upon the pivot pin 0,

and close the contacts by the cam disc h .the bell cran lever 03 being operated to open connected to the aXleof the induction magnet,.but this connection does not take place directly but indirectly through the medium of a member f that is adapted to rock upon a pivot g secured in a projection, on the edge of the disc Z; The member f bears with one end icon the cam disc it while its opposite end engages with the bell crank lever d. The intermediate member f is carried bya disc Z which'is rotatably mounted in a bearing'formed in the frame of the device. The axis of the disc I is arran ed co-axial with the axis of the rotor of t e device, and a handle 1' is fixed'to the disc Z to enable the disc to be displaced through an angle a.

The interruption takes place at the instant when a projection on the cam disc it passes underneath the head is of the intermediate member f.- Since the displacement afi'ects solelythe intermediate member, which does not carry any current. but only performs a mechanical function, neither flexible leads or rubbing contacts are required.

Various forms of apparatus having the same components difl'erently arranged'are shown as examples of construction, which perform the same object and are included in this appl cation to show how such an object vation, and in Figure 4 in section along the axis of the apparatus. The intermediate member in which is fixed to the lever arm 1", and can rock on the pin is fixed by means of the disc Z to the handle 71, and can be displaced together with this handle in the plane of the drawin The movable interrupter lever d, al which is fulcrumed at c, is adapted to rock at right angles to the said plane with its contact a that is situated 0pposite the stationary contact I) and insulated therefrom by the insulating piece 8. The arm al of this lever is pressed by the'spring 6 upon the intermediate member It so long as the contacts a and b are not pressing upon each other. This arm d carries an enlargement m which is constructed at right angles to the plane of oscillation of the lever, and

covers the range of displacement of the intermediate member-k, so that the cam disc it serves to operate the interrupter lever with unchanged leverage in all positions'of the intermediate member.

Having thus described my invention. what I claim is 1. In apparatus for varying the point of,

ignition in stationary coil electric ignition apparatus comprising in combination a make and break contact device with a spring controlled bell crank pivoted lever, a cam with projectionsthereon attached to the axle of the induction magnet, a hand operated circular member in an axial line with the said cam and having an extension lever and'a projection, and a curved intermediate member carried by said projection, such curved member having a projection on each face thereof, one of the last named projections engaging the cam and the other projection of the curved member engaging said'bell crank lever.

2. In apparatus for varying the point of ignition in stationary coil electric ignition apparatus comprising in combination a make and break contact device with a spring controlled double ended lever, a cam with jections thereon attached to the axle of the induction magnet, and a hand operated circular member in an axial line with said cam, having an extension lever with a curved projection engaging the edge of the cam, all mounted in an operative position in an extension of the frame, substantially as described.

pro-

3. In mechanism for varying the point of ignition in stationary coil electric ignition apparatus, a stationary contact, a plural armed pivotally mounted lever carrying a movable contact co-operating with the stationary contact for making and breaking a circuit, a rotating cam disc, a controllable member mounted to swing about the axis of the disc, and means carried by and movable with said member having one surface which bears against the cam disc and moves the member in one direction, and another surface which bears against the lever and is operated by said member.

4. A mechanism as defined by claim 3, in which a spring yieldingly presses the movable contact against the stationary contact.

5. In mechanism for varying the point of ignition in stationary coil electric ignition apparatus, a stationary contact member, a plural armed pivotally mounted lever hav ing one of its arms carrying a movable con tact member which co-operates with the stationary member for making and breaking a circuit, a rotating cam disc, a pivoted member fulcrumed to swing about the axis of the disc, and a lever pivotally mounted upon the pivoted member and having one surface which bears upon the periphery of the disc and is operated by said disc and another surface which engages one of the arms of the first lever and actuates the same. I

6. A mechanism as defined in claim 5 in which the fulcrum of the lever pivoted on the pivoted member is movable in an are having the axis of the disc as a centre.

7. In an apparatus for var 'ing the point of ignition in stationary coil e ectricignition apparatus, comprising a rotary cam disc and a movable interrupterlev'er, an intermediate member situated between said cam disc and said interrupter lever, mounted so as to be capable of rocking in a plane at right angles to the plane of displacement of said intermediate member, and the end of said interrupter lever that bears upon said intcrmedi ate member being formed with an enlargement at right angles to its rocking plane equal. to the range of displacement of said intermediate member, whereby the length of the effective leverage on said interrupter lever remains unchanged in the displacement of said intermediate member.

FREDERIC BILLON. 

